To fully use my old milling toolhead with the new adapter in the Thing-O-Matic,
I need an alternative build-platform.
One that can grip a PCB or something else to be milled.
To do that, there is one issue....
The default Automated-Build-Platform cannot be easily removed without
disassembling all of the platform, taking out the belt and re-tension
everything later when assembling it again.
So here I designed a modification for it, so the ABP can be taken out easily.
You just have to remove 4 bolts and it slides right of.